What defines a serious traffic violation in the context of CMV driving?

In the context of commercial motor vehicle (CMV) driving, a serious traffic violation is characterized by behaviors that significantly increase the risk of accidents and pose a danger to public safety. Each of the examples provided in the options reflects actions that can lead to severe consequences not only for the driver but also for passengers and the general public.

Exceeding the speed limit by more than 10 mph can be considered a serious traffic violation because it demonstrates a disregard for speed regulations, which are established to maintain safety on the roads. Speeding reduces a driver's ability to react to sudden changes in traffic conditions and increases the severity of accidents.

Driving under the influence of drugs and/or alcohol is one of the most critical violations that defines a serious traffic offense. This behavior severely impairs a driver’s judgment, reaction times, and overall ability to operate a vehicle safely. The legal repercussions are significant due to the potential for life-threatening accidents resulting from impaired driving.

Failing to yield to a school bus signal is particularly serious due to the vulnerable nature of children who may be boarding or disembarking from buses. This violation not only endangers the safety of children but also carries harsh penalties because of the heightened responsibility that drivers have in the vicinity of school zones.

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